Ultrasonic sensor comprising an adjustable detection area

Details Ultrasonic sensor comprising an adjustable detection area Ultrasonic sensor comprising an adjustable detection area

2005-08-03

2009-02-03

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

C367S902000

Reexamination Certificate

active

07486590

ABSTRACT:
The invention relates to an ultrasonic sensor with an adjustable detection range for use in gaseous media, preferably air. A threshold value generator generates threshold value curves that are fed to a comparator. The change in the detection range of the ultrasonic sensor, namely, the change in its switching point curve, is carried out by influencing the threshold value curves, whereby, in a selectable manner, the detection range can be adjusted either exclusively in the lateral extension of the sonic cone or else in the axial and lateral extensions of the sonic cone.

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